(ABCNEWS.GO) — Mark Wahlberg admits he “never made it past the ninth grade.” But he now has a high school diploma and he wants to help others do the same thing.

Wahlberg penned a blog yesterday for Huffington Post, explaining that for the past year, he’s been taking his missed high school classes online. “I’m happy to report that I am officially a high school graduate, having received my diploma this summer,” he said.

But the “Transformers” actor takes the 40 million adults nationwide who lack a high school diploma personally, as he’s lived the experience.